Do I need to take a plan b??

I’ve been on birth control for a little less than a month and haven’t missed any of my pills and have taken them at the same time each day. My boyfriend and I just had sex and the condom broke and he came inside of me. I’ve been sitting on the toilet and most of the cum has dripped out of me. Should I take a plan b or am I okay? Please comment your opinions I just don’t wanna spend the money if I don’t have to.